Sean, you may get more help on the Ford board, 'cause I don't think many of these suckers were ever used in GM trucks. BUT, I don't think you'll be able to use the 6-lug pattern with a full-floating 60. The lugs would get in the way of the axle (the 8 lug pattern is 6.5" instead of 5.5" like the 6-lug pattern).

TEX

/wwwthreads_images/icons/wink.gif Got Mud?
G.U.M.B.O. Mud Racing

 

Most rear FF Dana 60's are 1.31" dia/30 spline as you stated. The 1.5" dia/35 spline rear end units are rare.

Most front Dana 60'a (if not all) have 1.5"/35 spline shafts.

Dana 70 rear axle shafts are 1.5"/35 spline units. It may be possible that you could use the Dana 70 shafts inserted into the Dana 60 housing (don't forget to replace the stock 1.31' dia/31 spline carrier with a w/1.5" dia/35 spline Detroit Locker unit or other traction device to match your new axle shafts). You may have to enlarge the Dana 60 rear spindle hole. I'm not sure if you could just slide the 1.5" dia axle shafts into the housing since they were originally designed for 1.31" dia shafts.

If you do find out this is possible, could you please come back and post your finding here on the GM page? I would be interested to know if this is 'doable'.

Thanks and good luck
Walter

 

I'm looking into other options now. There isn't any really easy way to get a full floating 6lug 60 with 1.5" 35 spline shafts. About the only way to accomplish it is to cut the ends off a full floating 60 and weld in a 6 bolt flange or the big bearing Ford 9" end and then buy a FF kit from warn. Then you'd have to use the warn bracket to attach some cadillac calipers and either redrill some cj7 rotors for 6 lugs or possibly use some vented 6 lug rotors from an 81-83 Fj40 Toyota Landcruiser, front IFS Chevy 6lug rotors, or something that will work with the caddy calipers (Isuzu front rotors? Isuzu rear calipers have an e-brake provision). I'm not sure which of these would accept the correct sized bearing to fit onto the Warn spindle, if any would. I'd have to know what size bearing the Cj7 rotor takes in order to get a 6lug rotor that would work with the warn spindle. I'll let you guys know if I find anything.

I'm also looking into just redrilling a FF dana 60 (1.31" 30 spline) drum for 6 lugs and using alloy shafts. The alloy shafts are actually rated 4% stronger than a Corp.14 bolt shaft with 1.5" 35 splines.

I'll let you know what I come up with.
Sean

 

The 35 spline D60s are very rare and they generally can be found in Dodge 1 ton vans and trucks. Still rare. Look for a D60HD (Heavy Duty). The Vans usually have the offset rear diff, so this will not work for you, but if you were into modifying a carrier, this could work. If you use a Ford D60, you will have to drill out the spindles for the larger axle diameter. Then all you do is have to get some alloy 35 spline shafts made and get a Detroit or ARB to match the spline count.

Good luck.

--Eric